react-service-container
Version:
A simple, robust, idiomatic service locator library for React applications
166 lines (165 loc) • 7.55 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.useService = exports.ServiceContainer = exports.ServiceContainerContext = exports.ServiceContainerRegistry = void 0;
var react_1 = __importStar(require("react"));
var UNINSTANTIATED = Symbol.for("uninstantiated");
var ServiceContainerRegistry = /** @class */ (function () {
function ServiceContainerRegistry(parent) {
this.parent = parent;
this.providers = new Map();
this.parent = parent;
this.providers = new Map();
}
ServiceContainerRegistry.prototype.get = function (serviceToken) {
if (this.providers.has(serviceToken)) {
var initFn = this.providers.get(serviceToken);
try {
return initFn();
}
catch (err) {
console.error("[react-service-container] Provider for " + String(serviceToken) + " threw an error. " +
"Please check the error output below for more information.");
throw err;
}
}
if (this.parent != null) {
// This will recursively call each parent registry, until the base environment is hit in
// which case the base case is thrown below.
return this.parent.get(serviceToken);
}
var errorMsg = "[react-service-container] Could not find provider for token " + String(serviceToken) + ". " +
'Think of this as a "missing variable" error. Ensure that in one of your parent ' +
"service containers, you have configured your providers array to provide a value for this type.";
throw new Error(errorMsg);
};
ServiceContainerRegistry.prototype.add = function (provider) {
var _this = this;
if (!("provide" in provider)) {
var errorMsg = "[react-service-container] Missing \"provide\" key in object with key(s): " + stringifyKeys(provider) + ". " +
'Each provider must specify a "provide" key as well as one of the correct use* values.';
throw new Error(errorMsg);
}
var instance = UNINSTANTIATED;
var initFn = function () {
if (instance !== UNINSTANTIATED) {
return instance;
}
var init;
switch (true) {
case "useValue" in provider:
var value_1 = provider.useValue;
init = function () { return value_1; };
break;
case "useClass" in provider:
var Ctor_1 = provider.useClass;
init = function () { return new Ctor_1(); };
break;
case "useFactory" in provider:
init = provider.useFactory;
break;
case "useExisting" in provider:
var resolvedAlias_1 = provider
.useExisting;
init = function () {
try {
return _this.get(resolvedAlias_1);
}
catch (_) {
var errorMessage = "[react-service-container] Failed alias lookup for useExisting provider " + String(provider) + ". " +
"It looks like you passed a token to `useExisting` that was not registered as a provider. " +
"Ensure that the token given is registered *before* the alias is referenced. " +
"If the value reference by the alias is provided within the same providers array as the alias, " +
"ensure that it comes before the alias in the providers array.";
throw new Error(errorMessage);
}
};
break;
default:
var errorMsg = "[create-service-container] Provider missing proper use* value in key(s): " + stringifyKeys(provider, function (k) { return k !== "provide"; }) + ". " +
'Possible values are: ["useValue", "useClass", "useFactory", "useExisting"]';
throw new Error(errorMsg);
}
instance = init();
return instance;
};
this.providers.set(provider.provide, initFn);
};
return ServiceContainerRegistry;
}());
exports.ServiceContainerRegistry = ServiceContainerRegistry;
exports.ServiceContainerContext = react_1.default.createContext(null);
function ServiceContainer(_a) {
var providers = _a.providers, children = _a.children;
var parent = react_1.useContext(exports.ServiceContainerContext);
var registry = buildRegistry(providers, parent);
return (react_1.default.createElement(exports.ServiceContainerContext.Provider, { value: readonlyProxy(registry) }, children));
}
exports.ServiceContainer = ServiceContainer;
function useService(serviceToken) {
var container = react_1.useContext(exports.ServiceContainerContext);
if (!container) {
var errorMsg = "[react-service-container] Could not find service container context. It looks like you may have used the useService() hook " +
"in a component that is not a child of a <ServiceContainer>...</>. Take a look at your component tree " +
"and ensure that somewhere in the hierarchy before this component is rendered, there is a <ServiceContainer> " +
"available";
throw new Error(errorMsg);
}
return container.get(serviceToken);
}
exports.useService = useService;
function readonlyProxy(registry) {
var proxy = {
get: function (serviceToken) {
return registry.get(serviceToken);
},
};
return proxy;
}
function buildRegistry(providers, parent) {
var registry = new ServiceContainerRegistry(parent);
addProviders(registry, providers);
return registry;
}
function addProviders(registry, providers) {
normalize(providers).forEach(function (provider) {
registry.add(provider);
});
}
function normalize(providers) {
return providers.map(function (provider) {
var assumeClassShorthand = typeof provider === "function";
if (assumeClassShorthand) {
return {
provide: provider,
useClass: provider,
};
}
return provider;
});
}
function stringifyKeys(obj, filter) {
if (filter === void 0) { filter = function (k) { return true; }; }
return Object.keys(obj)
.filter(filter)
.map(function (k) { return "\"" + k + "\""; })
.join(", ");
}